Submarine drill



c. c. HANSEN SUBMARINE DRILL April 9, 1929,

Filed Aug. 18 1927 'INVEN TOR.

@atented Apr 9, 33329.

unites stares c if! TQATENT @FFTTCE- CHARLES C. HANSEN, 0F EAS'ION, PENNSYLVANIA, ASSIGNOR TO INGERSOLL-RAND CGMPANY, OF JERSEY CITY, NEWVJERSEY, A CORPORATION OF NEW JERSEY.

SUBIVIARINE DRILL.

Application filed August 18, 1927. Serial No. 213,816.

This invention relates to submarine drills, but more particularly to a hand held submarine drill in which the drill is provided with an extension to enable the manipulating handle to extend above the surface of the water in which the drill is submerged.

The objects of the invention are to enable a drill of the hand held type to be used for submarine drilling purposes and to seal the drill against the admission of water into the percussive element. I

Other objects will be in part obvious and in part pointed out hereinafter.

The invention consists of the combination of elements and arrangement of parts substantially as hereinafter described and claimed and illustrated in the accompanying drawing, in which c Figure l is an elevation partly in section of a submarine drill having the invention applied the'reto, and c Figure 2 is an elevation, in section, of the throttle valve.

Referrin to the drawin s A desi nates 2: p b 7 b generally a roclrdrill submerged in a body ofwater Bfor drilling holes Gin rock 1). The drill A comprises a cylinder E and a front head F which may be connected "to the cylinder by meansof the usual spring pressed side bolts G.

In the front head steel I-l having a collar J to limit the distance which the drill steel H may extend-into the front head and also to cooperate with a steel retainer K mounted on the' front head and embracing the drill steel H at a suitable dis,

is guided to extend above the surface of the water B. The handlel is provided with the usual grip portions Q, and preferably in the end of one of these grip portions is threaded a throttle valve R which may also be connected to a suitable source ofprcssure fluid supply (not shown).

In that grip portion Q to which the throttle valve R is conneotedis formed a passage S which leads to a passage T formed through the stem 0.

F isdisposed a drillv the drill steel H. v

, Pressure fluid admitted into the passages S a connection V leading to a valve chest W wherein may be disposed a suitable distributing valve (not shown) for distributing the pressure fluid to the ends of the cylinder E. The distributing valve however, may be of that. type which controls both the admission of pressure fluid into the cylinder and the exhaust of fluid therefrom, and the valve chest V7 is accordingly provided with an exhaust port X for this purpose;

In order to effect "a thorough cleansing of the drill hole C and thus present a clean rock face for the working implement H, the drill is provided with means for introducing cleansing liquid into the drill hole. These means in the present instance comprise a tube Y disposed in the passage T to communicate with a water tube Z which may extend lnto ans a 3i e 'leadin fromaum "or other means adapted to supply water under pressureto In order to enable the fluidfrom the cylinder E to be exhausted directly into the water in which the drill A may be submerged, said drill is provided with a check vvalve 9 connected to the exhaust port X and adapted to prevent the admission of water into the drill. 'lhe'chcck'valve in this instance comprises a casingh threaded to a connection which in turn maybe. threaded to the valve chest WV. The casing it in this instance comprises reduced end portions 70 and'o and a central flared portion 20. The .end portion 7a in this instance is threaded into the connection j and'has a passage 1 for conveying the exhaust fluid from the port X into the flared portion p from whence it may pass into the water B through ports 7?. V r v 'The outer end portion 0 of the casing is vbored to form a valve'chamber s in which is disposed a reciprocable valve seating against the outlet opening a of the passage The valve t may be of cup shaped form as illustrated in order to reduce its weight to a minimum and is normally held closed by a spring which extends into the valve 25' at one end and 1s seated with its other end against a plug 20 screwed in the outer end of 7 portion 0. The spring '0 is preferably of such Strength that it bears against the valve 2? with only suflicient force to hold said valve lightly to its seat. iv

. To the end that the pressure of the spring may befauginented by the pressure of the war vter in which the drill A is subinerged, the

plug L J' is provided with a port 00 to permit theaentrance oil Water into the valve chamber s to act against the out-erend of the valve 6.

Preferably, the throttle valve R, which may beoi any'suitabl'e type, is provided with leak ports y and a to admit asinall amount oi pressure 'fiuid into the drill when thethrottle valve R is closed] The pressure fluid thus leaking into the drill will prevent the entrance of water into any portion of the drill 'A, either at the rfront end of the front head oi anyother place in which it might other wisefbe possible for water to enter.

In practice, whenever the drill A is in V v operation,;exhaust fluid. passing from the cylinder E will flow through the exhaust port X and the passage 9 and unseat the. Valve t. The exhaustfiuid will then pass througlitlie flared portion .p of the casing and through the ports 1" into the surrounding water B. Immediately upon theexhaust e f flui d froin the passage 1 the forces of the water 13 and the spring v acting against the valve t will close said valve, andprevent the entrance of Water into the interior of the drill at'this point;

' Alfterthe throttle valve R has been closed a suitable amount offpressure fluid will 'le'alr 7 through the ports'g and 2 into the drill to resist the entrance Water at all points i V where water might otherwise find its way into the drill.

' As will be apparent, the present invention enables va drill of the'hand held typejto be used for submarine drilling in which it may be inconvenient or impractical to utilize the rather elaborate equipment usually provided for this purpose. A drill constructed as in the present instance 18 particularly applica-v of a cylinder and back head, a liandle tor the water guiding the drill, a stem on the handle con 3 ne'cted rigidly to the back head, said stein having a'passage for conveying pressure fluid,

to the drill, a check valve controlling the flow of exhaust fluid, from the di'illinto the water in which the drill is submerged, and means for insurine a constant-sun l of" iessure I b i u I 1 rluid in the drill during the inoperative period of the drill for preventing the adm1ssion of water into any portion ofthe drill.

2. In a submarine drill, the'coinb nation of a cylinder and back head, a handle for guiding the drill, a stem onthe handle connected rigidly to theback head, said stem having apa'ssag'e for conveying pressure fluid to the drill, a check. valve controll ngzthe flow of exhaust fluid from the drillinto the waterin' which the drill is submerged, a

throttle valve controlling the admission of pressure fluid into the drill, and a leak port 7 in the throttle valve constantly admitting pressure fluid into the vdrill when the, thro'ttle valv is closed to prevent the re'ntmnce of water into'thed fll r v I In testimony whereof l'hafve signed this specification. 

